PROBLEM TO BE SOLVED: To provide an advertisement distribution system capable of enhancing advertising effects by enabling a provision of advertisements related to an originating telephone number in response to an input of the originating telephone number.;SOLUTION: An advertisement distribution system 1 includes advertisement request means 131 for requesting advertisement information to display advertisements related to an originating telephone number in response to detection of an input operation of the originating telephone number, telephone number search means 212 for searching for Web pages, by using the originating telephone number as a query in response to the request for advertisement information, high-ranked Web page acquisition means 213 for acquiring Web pages ranked higher than a predetermined rank among the Web pages, characteristic keyword extraction means 214 for extracting characteristic keywords in the high-ranked Web pages by analyzing these Web pages, and advertisement information acquisition means 216 for acquiring advertisement information related to the keywords based on the extracted keywords.;COPYRIGHT: (C)2012,JPO&INPIT
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